Miss Fitler spent her happiest days riding horses on her 25-acre estate, where she kept her own stable. She also loved to travel, taking groups of her friends on trips to Europe.
"She was a Victorian lady, a socialite from old Philadelphia," said her nephew, William W. Fitler 3d of Haverford.
"She was a brilliant woman who spoke six languages," he said. "She loved the camaraderie of her friends while she was visiting the castles of Europe, or going up and down the Rhine or the Thames, and studying the customs of old Europe."
Her genteel world was turned upside down in 1974, however, when at age 77, she became engaged to Michael Wilson, a 29-year-old waiter.
Miss Fitler soon became fodder for lurid press stories on both sides of the Atlantic. In front-page stories, she was branded the "Main Line Heiress" or the "Main Line spinster," as reporters speculated on the size of her fortune and the motives of her fiance.
The two met while Miss Fitler was visiting the Breakers Hotel in Palm Beach, Fla., where Wilson, the son of a Welsh miner, was a waiter. The engagement was later broken by Miss Fitler, who had to summon police to have Wilson evicted from her mansion. She then resumed her quiet life.
"She was a quiet, sensitive person," her nephew said, adding that after the engagement was broken, "she began to thrive again."
She was a 1914 graduate of the Agnes Irwin School. In 1940, she received a bachelor of arts degree in history from the University of Pennsylvania.
She is survived by her nephew; niece Margaretta "Happy" Fitler Rockefeller, and a great-niece, Lydia C. Fitler.
Services are private.